A and B have two servers, the server installed on A docker zabbix server, installed the agent on the B side,
Using the docker 172.172.0.0 is configured on the network to the server on A/24 segment, server B is 172.172.1.0/24
On the server address is 172.172.0.21 server A, B is the address of the agent on 172.172.1.23
Now both ends can ping each other, can also ping all night long the address of the host,
But when I use tcpdump to view the agent from the agent host port communication situation when such a situation:
IP 172.172.1.23. The zabbix agent - & gt; 172.16.101.72.56038: Flags [R], seq 2, ack 31, 227, win the options [nop, nop, TS val 0 ecr 3566448078], length 0
IP 172.16.101.72.56038 & gt; 172.172.1.23. Zabbix - agent: Flags [P], seq and, ack 1, win 229, options [nop, nop, TS val 3566448078 ecr 21619591], length of 30

And why he is the address of A host machine communication?
I was in the zabbix - agentd. Conf 172.172.0.21 is the server address?

To solve the